Find remote AI training and data labeling jobs open to applicants in Brazil.
Evaluate AI responses for practical small business scenarios in Spanish. Create prompts, compare chatbot answers, and submit structured feedback for 20+ hours per week.
Posted Aug 1, 2026
Use your medical judgment to evaluate how AI systems handle clinical reasoning, create realistic scenarios, and identify gaps in medical knowledge. This remote, flexible engagement is open worldwide and requires an active medical license.
Posted Jul 25, 2026
Record or review Egyptian Arabic audio and give clear feedback that helps AI systems improve. This remote contractor role offers flexible hours over 1 to 3 months and pays $30 to $65 per hour.
Posted Jul 25, 2026
Record Saudi Arabic phrases, transcribe them accurately, and help create audio data for AI training. This remote, part-time contract pays $30 to $65 per hour and requires Arabic and English fluency.
Posted Jul 25, 2026
Evaluate personalized conversational AI in Russian by testing prompts, ranking responses, and explaining quality issues. This remote contractor role pays $15 per hour and requires at least 20 hours per week.
Posted Jul 24, 2026
Record expressive Korean voice performances for AI training projects, using clear delivery, emotional range, and varied character styles. This flexible freelance role requires 20+ hours per week and quality recording equipment.
Posted Jul 20, 2026
Evaluate how AI uses personal context in Polish conversations, compare responses, and write detailed feedback. This remote contractor role pays $20 per hour and requires at least 20 hours per week.
Posted Jul 20, 2026
Work as a Business Analyst evaluating Bahasa Indonesian and English language model content. Analyze information, research claims, write explanations, and create examples that help improve AI systems for 20+ hours per week.
Posted Jul 20, 2026
Lead technical teams delivering supervised fine-tuning and RLHF work for language models. This contract role needs 8+ years in software engineering, 3+ years managing engineers, fluent English, and availability of 20+ hours each week.
Posted Jul 20, 2026
Design challenging math problems, review language model solutions, and verify Python and Lean proofs in a remote contractor role requiring at least 20 hours per week.
Posted Jul 20, 2026
Evaluate how well AI uses personal context in multi-turn conversations, assess response quality, and explain your decisions. This three-month contractor role requires English fluency, at least 20 hours weekly, and four hours of overlap with PST.
Posted Jul 17, 2026
Write technical documentation, analyze public datasets and JSON, and explain findings with Python-supported notebooks. This remote contractor role requires 20 or more hours weekly and strong English communication.
Posted Jul 17, 2026
Review and improve AI-generated C and C++ code, develop backend components, and guide technical work on dialogue-agent systems. This worldwide contract role offers part-time work of 20 or more hours per week.
Posted Jul 17, 2026
Write, research, summarize, and review content used to train language models. This remote contract role is open worldwide, requires fluent English, and calls for 20+ hours each week.
Posted Jul 17, 2026
Annotate and review Portuguese text data for AI projects from a remote setting in Brazil. This part-time contractor role pays $30 to $65 per hour and requires professional Portuguese, fluent English, and language data experience.
Posted Jul 17, 2026
Evaluate AI chatbot responses for realistic small business situations in Japanese. This remote, flexible project runs for 16 weeks and requires at least 20 hours each week.
Posted Jul 17, 2026
Review and compare AI chatbot responses for realistic small business scenarios using Korean business documents. This remote, flexible project lasts 10 weeks and requires 20 or more hours per week.
Posted Jul 17, 2026
Record Spanish (Latam) voices for AI training projects involving characters, stories, and varied domains. Bring clarity, emotion, vocal range, and professional audio skills to flexible freelance work.
Posted Jul 17, 2026
Record expressive French voice-overs for AI training and creative projects from a home or professional studio. This flexible contractor role requires 20+ hours weekly, clear French speech, vocal versatility, and quality recording equipment.
Posted Jul 17, 2026
Create expressive Arabic voice recordings for AI training, using clear speech, emotional range, and strong vocal control. This flexible freelance role requires previous voice acting experience and quality recording equipment.
Posted Jul 17, 2026
Create expressive Japanese voice recordings from scripts for AI audio training. This flexible freelance role offers remote work, 20+ hours per week, and requires voice acting experience plus quality recording equipment.
Posted Jul 17, 2026
Review Tagalog and English AI content, research claims, answer analytical questions, and explain model feedback. This entry-level contract role requires 20+ hours a week and offers a remote application path through OpenTrain.
Posted Jul 17, 2026
Review Malay and English AI responses, research claims, solve reasoning tasks, and write detailed feedback. This remote contractor role requires 20+ hours per week and accepts applicants worldwide.
Posted Jul 17, 2026
Analyze written content, research claims, answer reasoning questions, and give detailed feedback to improve language models. This remote contractor role requires professional fluency in English and Hebrew and 20+ hours per week.
Posted Jul 17, 2026
Analyze Turkish content, research claims, answer reasoning questions, and create clear feedback for language model training. This remote, part-time contractor role requires English and Turkish fluency and 20+ hours per week.
Posted Jul 17, 2026
Analyze English and Swedish content to improve large language models through research, reasoning tasks, claim validation, summaries, and detailed feedback. This remote contractor role requires 20+ hours per week and is open worldwide.
Posted Jul 17, 2026
Work remotely as a Danish-English Business Analyst supporting multilingual LLM evaluation through research, analytical questions, summaries, and detailed feedback. This entry-level contractor assignment requires 20+ hours per week and accepts applicants worldwide.
Posted Jul 17, 2026
Review language model answers, research claims, solve analytical problems, and explain your reasoning in Korean and English. This entry-level contract role requires 20 or more hours each week and a reliable computer.
Posted Jul 17, 2026
Analyze Japanese and English content to help improve large language models. Create reasoning examples, check claims, answer analytical questions, and give clear feedback in a remote role requiring 20+ hours each week.
Posted Jul 17, 2026
Work remotely as a Business Analyst supporting language model improvement through Dutch and English question answering, research, reasoning, and detailed feedback. The role is open worldwide and requires 20 or more hours each week.
Posted Jul 17, 2026
AI training and data labeling involve human work used to prepare and review examples for artificial-intelligence systems. Depending on the individual role, tasks can include labeling images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. For applicants located in Brazil, only the individual posting can confirm whether that opportunity accepts applications from Brazil and explain the work involved.
OpenTrain is the hiring organization for these roles, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Review each individual posting for the details and requirements that apply to that opportunity, including whether applicants located in Brazil are eligible.
